How much?

[ringram]

I'm getting close to build my unit, and I'm trying to decide how much light I need.

I'm going to use a 15" lcd panel. Would I need a 400w MHI or is 250w enough?

 

[Quin]

You have to ask yourself how big you want the screen to be, and what level of ambient light will be present.

Some say that with a well selected reflector and condensor setup, 250w is all you'd ever need.